If the rear end sits higher than the front after the drop is installed, you might also try removing the overload spring in the rear leaf pack. The rear end will sit lower, and be a less harsh ride. I have a 5 front and 7 rear drop on my 84 square shortbox. The front consists of a drop spindle and coil, the rear consists of a flip kit, one leaf removed and drop shackles (not hangers). I did also install a mini notch for added clearance. Installing drop shackles and not hangers will require trimming notches into the bed support rails to allow the drop shackles to clearance. There is NO NEED to use drop hangers. Actually, the rear is simpler than the front to lower. Don't forget about the change in shock length ( I went with shorter gas charged shocks instead of shock extension mounts).
If you are running the oem rallys (like I was), the small wheel dia and backspacing will end up rubbing the lower arm and tearing off the inner wheel weights. The p.o. notched the lower arms, which I am dead set against. Cutting too much can weaken the arms. Its worth it imo to run a larger dia. wheel to avoid clearance issues, rather than hacking away at the factory arms just to make something work with a drop spindle. A larger dia wheel gives the truck a lower stance look, with added clearance between the spindles, calipers and arms. If you must run the rallys then reinforce the arm if you absolutely have to notch for clearance. A cut off whell is an easy fix, just not always the best way ...but thats my opinion and its your truck.
Just last weekend I cut out the bed between the fenderwells and installed a tunnel since in the near future it will be bagged starting with the rear, and fully notching the frame. The front factory bumpstops and bracket were cut off and replacement polyurethane stops and lower brackets were fabbed so bottoming out isnt so harsh (metal on metal and shredded tires).
Btw...bodywork continues because paint will be done next month......
One more item to keep in mind is fenderwell clearance up front. I removed my factory fenderwells and installed new fenderwells that are about 4 inches below the hood. The rear fenders arent an issue even running 12 " wide tires on 20" wheels.
definately post progress pics...sub'd